The GMC Sierra 3500HD III, specifically the Crew Cab Long Box configuration with the 6.0-liter V8 engine and automatic transmission, represents a significant iteration in GMC’s heavy-duty truck lineage. Produced from 2011 to 2013 as part of the GMT900 platform’s facelift, this variant was aimed at buyers needing substantial towing and hauling capacity combined with a degree of passenger comfort. It occupied a middle ground within the 3500HD lineup, offering a balance between the more affordable work-truck trims and the fully-loaded Denali models. This truck was a mainstay of the American heavy-duty pickup market, catering to contractors, ranchers, and those requiring a powerful vehicle for both work and personal use.
Technical Specifications
| Brand | GMC |
| Model | Sierra 3500HD |
| Generation | Sierra 3500HD III (GMT900, facelift 2011) Crew Cab Long Box |
| Type (Engine) | 6.0 V8 (360 Hp) SRW Automatic |
| Start of production | 2011 |
| End of production | 2013 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Pick-up |
| Seats | 5 |
| Doors | 4 |
| Fuel Type | Petrol (Gasoline) |
| Weight-to-power ratio | 8.1 kg/Hp, 124.2 Hp/tonne |
| Weight-to-torque ratio | 5.6 kg/Nm, 177.6 Nm/tonne |
| Power | 360 Hp @ 5400 rpm |
| Power per litre | 60.3 Hp/l |
| Torque | 515 Nm @ 4200 rpm, 379.84 lb.-ft. @ 4200 rpm |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | Vortec L96 |
| Engine displacement | 5967 cm3, 364.13 cu. in. |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 101.6 mm, 4 in. |
| Piston Stroke | 92 mm, 3.62 in. |
| Compression ratio | 9.6:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | OHV, VVT |
| Engine oil capacity | 5.7 l, 6.02 US qt | 5.02 UK qt |
| Coolant | 15.5 l, 16.38 US qt | 13.64 UK qt |
| Kerb Weight | 2899 kg, 6391.2 lbs. |
| Max. weight | 4853 kg, 10699.03 lbs. |
| Max load | 1954 kg, 4307.83 lbs. |
| Trunk (boot) space – maximum | 2138 l, 75.5 cu. ft. |
| Fuel tank capacity | 136 l, 35.93 US gal | 29.92 UK gal |
| Permitted trailer load with brakes (12%) | 5897 kg, 13000.66 lbs. |
| Length | 6581 mm, 259.09 in. |
| Width including mirrors | 2436 mm, 95.91 in. |
| Height | 1979 mm, 77.91 in. |
| Wheelbase | 4260 mm, 167.72 in. |
| Front track | 1748 mm, 68.82 in. |
| Rear (Back) track | 1709 mm, 67.28 in. |
| Ride height (ground clearance) | 216 mm, 8.5 in. |
| Minimum turning circle (turning diameter) | 16.7 m, 54.79 ft. |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission Hydra-Matic |
| Front suspension | Independent torsion bar, double wishbone |
| Rear suspension | Rigid axle suspension, Leaf spring |
| Front brakes | Ventilated discs, 355×40 mm |
| Rear brakes | Ventilated discs, 373×34 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Tires size | 235/80 R17; 265/70 R18 |
INTRODUCTION
The 2011-2013 GMC Sierra 3500HD Crew Cab Long Box, powered by the 6.0-liter Vortec L96 V8 and paired with a six-speed Hydra-Matic automatic transmission, was a workhorse designed for demanding tasks. This generation represented a significant refresh of the GMT900 platform, introducing updated styling, improved interior materials, and enhanced towing capabilities. The Crew Cab configuration offered a spacious interior, accommodating five passengers comfortably, while the Long Box provided ample cargo space. This particular variant aimed to bridge the gap between the base-model work trucks and the more luxurious Denali trim, offering a compelling combination of capability and comfort for a broad range of buyers.
Powertrain & Engine Architecture
At the heart of this Sierra 3500HD lies the Vortec L96 6.0-liter V8 engine. This engine is a member of GM’s Vortec family, known for its robust construction and reliable performance. The L96 utilizes a cast iron block and aluminum cylinder heads, featuring a 9.6:1 compression ratio and a two-valve-per-cylinder (OHV) valvetrain with variable valve timing (VVT). Fuel delivery is managed by a multi-port fuel injection system. The engine produces 360 horsepower at 5400 rpm and 515 lb-ft of torque at 4200 rpm. The Hydra-Matic 6L80E six-speed automatic transmission was the sole transmission option for this configuration. This transmission is known for its smooth shifting and durability, offering a wide gear ratio spread to optimize both towing performance and fuel efficiency. The transmission’s gear ratios are tuned to maximize the engine’s torque output, providing strong acceleration even when heavily loaded.
Driving Characteristics
The 6.0-liter V8 and six-speed automatic combination delivers a capable, if not exhilarating, driving experience. While not as quick as some of the diesel-powered counterparts, the L96 provides ample power for everyday driving and demanding towing scenarios. The automatic transmission shifts smoothly and predictably, and the wide gear ratio spread allows the engine to stay within its optimal power band. Compared to the available Duramax diesel engine, the 6.0L V8 offers less torque, resulting in slightly slower acceleration and a lower maximum towing capacity. However, the V8 is significantly less expensive to purchase and maintain. Compared to the 4.8L V8, the 6.0L provides a noticeable increase in power and torque, making it a more suitable choice for those who frequently tow or haul heavy loads. The truck’s substantial weight and long wheelbase contribute to a comfortable ride, but also result in noticeable body roll during cornering.
Equipment & Trim Levels
The 2011-2013 GMC Sierra 3500HD Crew Cab Long Box 6.0L V8 typically came standard with features such as air conditioning, power windows and locks, a tilt steering wheel, and a basic audio system. Higher trim levels added features like leather upholstery, heated front seats, a premium audio system, navigation, and a rearview camera. Optional extras included a trailer brake controller, a fifth-wheel hitch, and various appearance packages. The interior materials were generally durable and functional, with a focus on practicality rather than luxury. The Crew Cab configuration provided ample space for passengers, with comfortable seating and generous legroom.
Chassis & Braking
The Sierra 3500HD utilizes a robust chassis designed to withstand heavy loads and demanding conditions. The front suspension features an independent torsion bar setup with double wishbone components, while the rear suspension employs a traditional leaf spring design. This configuration provides a good balance of ride comfort and load-carrying capacity. Braking duties are handled by ventilated disc brakes on all four wheels, providing ample stopping power even when towing. An Anti-lock Braking System (ABS) is standard. The truck’s steering system utilizes a cone worm with recirculation balls, offering a solid and predictable feel.
Market Reception & Comparison
The 6.0-liter V8-powered Sierra 3500HD received generally positive reviews, particularly from buyers who prioritized affordability and simplicity over the higher performance and fuel efficiency of the diesel option. Critics praised the truck’s robust construction, ample towing capacity, and comfortable ride. However, some noted that the V8 engine lacked the low-end torque of the Duramax diesel. Fuel economy was considered average for a heavy-duty truck, and reliability was generally good, although some owners reported issues with the active fuel management system. Compared to the diesel models, the 6.0L V8 offered a lower purchase price and reduced maintenance costs, making it an attractive option for budget-conscious buyers.
Legacy
The 2011-2013 GMC Sierra 3500HD with the 6.0-liter V8 and automatic transmission remains a popular choice in the used truck market. The Vortec L96 engine is known for its durability and relatively simple maintenance requirements. While not as sought-after as the diesel models, these trucks offer a compelling value proposition for buyers who need a capable and reliable heavy-duty pickup without the higher cost of ownership associated with diesel power. Common maintenance items include regular oil changes, spark plug replacements, and occasional repairs to the fuel injection system. Overall, this variant of the Sierra 3500HD represents a solid and dependable work truck that continues to provide years of service.
